n. (Zool.) (a) The bobolink. (b) One of several small Asiatic singing birds of the genera Schœnicola and Eurycercus; -- called also reed babbler. n. (Zool.) See Rietboc. [ 1913 Webster ]
n. 1. the process in which part of the output of a system is returned to its input. [ WordNet 1.5 ]
2. response to an inquiry or experiment. [ WordNet 1.5 ]